hardcase

I have a 03 xr6t turbo engine with 4 spd auto. if the na crank is the same and heads just need valve and spring upgrade, then I may as well leave my engine in tact and sell it. I intend doing forged piston and rod upgrade etc so makes more sense $$$$$ wise to get a na long block and build that up.

what are the main differences between a na and turbo barra. I have a ba xr6t turbo engine that I want to build for a project. going to do rods and pistons etc etc. is the na crank the same as the turbo also what are the differences in heads. cheers